01 - 
                Set your oven to 350°F (175°C) and cover two baking sheets with parchment paper.
              
              
              
                02 - 
                Use a big mixing bowl, and whip the butter with the brown sugar until it looks fluffy. Stir in the egg and vanilla until smooth.
              
              
              
                03 - 
                Take a second bowl and stir together the flour, salt, cocoa, baking powder, and baking soda.
              
              
              
                04 - 
                Slowly fold the dry mix into the creamy mixture until everything’s combined.
              
              
              
                05 - 
                Gently stir in the Reese’s Pieces so they’re spread out evenly.
              
              
              
                06 - 
                Shape the dough into balls about ¼ cup each, pressing extra candies on top if you like.
              
              
              
                07 - 
                Lay the dough balls on your prepped sheets, making sure there’s about 2 inches of space around each one.
              
              
              
                08 - 
                Put them in the oven for 10-12 minutes. Rest the cookies on the sheets for 5 minutes, then move them onto a rack to cool completely.